Improvement in tools for finishing axle-blanks



H. E. FURREST.

Toul for Finishing Axle Bianks.

No. 134,742. Patentedlammnms.

Wy-o2.

agg@ N UNITED STATES ATENT OFFICE.

HAMLET E. FORREST, OF OAMBRIDGEPORT, MASSACHUSETTS, KASSIGr'NOB. TOHIMSELF, HORATIO BOOTHBY, OF BOSTON, MASSACHUSETTS, AND JOHN H. LEAVITT,OF PORTLAND, MAINE.

IMPROVEMENT IN TOOLS FOR FINISHING AXLE-BLANKS.

Specification forming part of Letters Patent No. 134,742, dated January14, 1873.

To all whom t may concern:

Be it known that I, HAMLET E. FoEREsT, of (lambridgeport, in the countyof Middlesex and State of Massachusetts, have invented a new and usefu'lor Improved Lathe-Tool for Finishing a Metallic Axle-Blank, or formingthe journal and collar thereon at a single operation.

Heretofore in the formation of axle-journals, upon the swaged metallicblanks by means of a lathe, the axle-blank has been finished or reducedto the desired form by means of a narrow tool or series of tools firmlyaffixed to a tool-stock havinghorizontal compound movements-that is,both transversely and longitudinally of the axis of the lathe. In orderto reduce the parts to the desired shape the workman was not onlyobliged to frequently stop and measure the journal as the reduction tookplace, but also to stop and gage or shift the tool for each change inthe form of the journal. Under this method great care and skill wererequired to render the journals and their adjuncts of one standarduniform size, and the result has been that by such process only anapproximation to a uniformity has been attained. The object of myinvention is to produce a tool by which a novice in the art of workingor turning metal can produce or turn any given number of axle -journalswith their adjuncts or collars with the greatest certainty and ease; andmy invention consists in a cutter or tool for forming or shaping thejournal and collar of an axle, as made with a compound inclination, onebeing longitudinal and the other transverse, the former being to causethe edge of the tool to cut with a drawing stroke, and permit only asmall portion of the edge to act upon the metal to be. reduced at onetime, and the latter incline being to impart to the journal therequisite degree of taper.

In the accompanying drawing, Figure 1 denotes a top view of my improvedtool as applied to a lathe; Fig. 2, a side view of the same; Figs. 3 and4 are end views; and Fig. 5 an edge view of the cutter or tool detached.

In Figs. 1 and 2, A denotes the axle or journal-blank as affixed to thearbor of an ordinary lathe. B is the carriage to which the cutter (listo be firmly secured. This cutter consists of a fiat plate of steel of aquadrilateral shape, and of a width corresponding to the portion of theblank to be reduced, such cutter being formed with a compoundinclination or longitudinal and transverse tapersthat is, with atapering cutting-edge, o, to

produce a drawing stroke, and with a lateral f The cutter havin g. therequired shape to im part the desired form to the journal is to befirmly fixed upon a carriage, or adjustable sup f port; or` rest soarranged as to slide upon the bed or frame of the lathe, thecutting-edge of the knife being set and xed at such an alti tude, withrespect to the forging or journalA blank, that the cutter, when havingacted on the blank and reduced the same to the requisite form, shallfreely slide under the finished journal.

The cutter may be fed up to the blank to be reduced either automaticallyor by means of a screw operated by manual power. By thus forming thecutter. and locating it on a xed determinate plane, with respect to theaxis of the arbor of the lathe-that is, so that when the journal isformed the cutter will pass freely under the same--a novice or per sonunskilled in the art of turning` or reducing metals can readily produceor iinish, with perfect uniformity, the journal and eollarupon anydesired number of axle-blanks.

In operating with my improved tool the same is so arranged that the partfor forming the smaller end of the journal is first caused to impingeagainst the blank, which, gradually advancing, reduces such part to there' l "quired shape, passes under the same, and al- V`vlows freshportions of the cutting-edge to act upon the blanlgnnd passunder thesame until the entire reduction of the blank has taken place, the cutteroperating with a continuous drawing stroke during its entire action.

'Having described my invention, wha-t I claim is The improvedlathe-tool, as described, the

'same consisting of the plate G, formed with the compound inclination orangular cuttingedge o and lateral taper of, and with the collar formingrecess a, the Whole being as and for the purpose set forth.

HAMLET E. FORREST. Witnesses:

F. P. HALE, F. G. HALE.

